feat: '상점에 달린 태그 조회 API' 서비스 로직 구현

Author: leegwichan

src/main/java/eatda/controller/store/TagsResponse.java

@@ -0,0 +1,16 @@
+package eatda.controller.store;
+
+import eatda.domain.cheer.CheerTag;
+import eatda.domain.cheer.CheerTagName;
+import java.util.List;
+
+public record TagsResponse(List<CheerTagName> tags) {
+
+    public static TagsResponse from(List<CheerTag> cheerTags) {
+        List<CheerTagName> cheerTagNames = cheerTags.stream()
+                .map(CheerTag::getName)
+                .distinct()
+                .toList();
+        return new TagsResponse(cheerTagNames);
+    }
+}

src/main/java/eatda/repository/cheer/CheerTagRepository.java

@@ -1,8 +1,11 @@
 package eatda.repository.cheer;
 
 import eatda.domain.cheer.CheerTag;
+import eatda.domain.store.Store;
+import java.util.List;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface CheerTagRepository extends JpaRepository<CheerTag, Long> {
 
+    List<CheerTag> findAllByCheerStore(Store storeId);
 }

src/main/java/eatda/service/store/StoreService.java

@@ -9,9 +9,12 @@
 import eatda.controller.store.StoreResponse;
 import eatda.controller.store.StoresInMemberResponse;
 import eatda.controller.store.StoresResponse;
+import eatda.controller.store.TagsResponse;
+import eatda.domain.cheer.CheerTag;
 import eatda.domain.store.Store;
 import eatda.domain.store.StoreCategory;
 import eatda.repository.cheer.CheerRepository;
+import eatda.repository.cheer.CheerTagRepository;
 import eatda.repository.store.StoreRepository;
 import eatda.storage.image.ImageStorage;
 import java.util.List;
@@ -28,6 +31,7 @@ public class StoreService {
 
     private final StoreRepository storeRepository;
     private final CheerRepository cheerRepository;
+    private final CheerTagRepository cheerTagRepository;
     private final ImageStorage imageStorage;
 
     public StoreResponse getStore(long storeId) {
@@ -51,6 +55,13 @@ private List<Store> findStores(int page, int size, @Nullable String category) {
                 StoreCategory.from(category), PageRequest.of(page, size));
     }
 
+    @Transactional(readOnly = true)
+    public TagsResponse getStoreTags(long storeId) {
+        Store store = storeRepository.getById(storeId);
+        List<CheerTag> cheerTags = cheerTagRepository.findAllByCheerStore(store);
+        return TagsResponse.from(cheerTags);
+    }
+
     public ImagesResponse getStoreImages(long storeId) {
         Store store = storeRepository.getById(storeId);
         List<String> imageUrls = cheerRepository.findAllImageKey(store)

src/test/java/eatda/fixture/CheerTagGenerator.java

@@ -0,0 +1,24 @@
+package eatda.fixture;
+
+import eatda.domain.cheer.Cheer;
+import eatda.domain.cheer.CheerTag;
+import eatda.domain.cheer.CheerTagName;
+import eatda.repository.cheer.CheerTagRepository;
+import java.util.List;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CheerTagGenerator {
+
+    private final CheerTagRepository cheerTagRepository;
+
+    public CheerTagGenerator(CheerTagRepository cheerTagRepository) {
+        this.cheerTagRepository = cheerTagRepository;
+    }
+
+    public List<CheerTag> generate(Cheer cheer, List<CheerTagName> tagNames) {
+        return tagNames.stream()
+                .map(name -> cheerTagRepository.save(new CheerTag(cheer, name)))
+                .toList();
+    }
+}

src/test/java/eatda/service/BaseServiceTest.java

@@ -8,6 +8,7 @@
 import eatda.client.oauth.OauthClient;
 import eatda.domain.ImageKey;
 import eatda.fixture.CheerGenerator;
+import eatda.fixture.CheerTagGenerator;
 import eatda.fixture.MemberGenerator;
 import eatda.fixture.StoreGenerator;
 import eatda.fixture.StoryGenerator;
@@ -57,6 +58,9 @@ public abstract class BaseServiceTest {
     @Autowired
     protected CheerGenerator cheerGenerator;
 
+    @Autowired
+    protected CheerTagGenerator cheerTagGenerator;
+
     @Autowired
     protected StoryGenerator storyGenerator;
 

src/test/java/eatda/service/store/StoreServiceTest.java

@@ -7,6 +7,9 @@
 import eatda.controller.store.ImagesResponse;
 import eatda.controller.store.StoreResponse;
 import eatda.controller.store.StoresInMemberResponse;
+import eatda.controller.store.TagsResponse;
+import eatda.domain.cheer.Cheer;
+import eatda.domain.cheer.CheerTagName;
 import eatda.domain.member.Member;
 import eatda.domain.store.District;
 import eatda.domain.store.Store;
@@ -15,6 +18,7 @@
 import eatda.exception.BusinessException;
 import eatda.service.BaseServiceTest;
 import java.time.LocalDateTime;
+import java.util.List;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -154,6 +158,49 @@ class GetStores {
         }
     }
 
+    @Nested
+    class GetStoreTags {
+
+        @Test
+        void 음식점의_태그들을_조회한다() {
+            Member member1 = memberGenerator.generate("111", "[email protected]", "nickname1");
+            Member member2 = memberGenerator.generate("112", "[email protected]", "nickname2");
+            Store store = storeGenerator.generate("농민백암순대", "서울 강남구 대치동 896-33");
+            Cheer cheer1 = cheerGenerator.generateCommon(member1, store);
+            Cheer cheer2 = cheerGenerator.generateCommon(member2, store);
+            cheerTagGenerator.generate(cheer1, List.of(CheerTagName.INSTAGRAMMABLE, CheerTagName.ENERGETIC));
+            cheerTagGenerator.generate(cheer2, List.of(CheerTagName.INSTAGRAMMABLE, CheerTagName.CLEAN_RESTROOM));
+
+            TagsResponse response = storeService.getStoreTags(store.getId());
+
+            assertThat(response.tags()).containsExactlyInAnyOrder(
+                    CheerTagName.INSTAGRAMMABLE, CheerTagName.ENERGETIC, CheerTagName.CLEAN_RESTROOM);
+        }
+
+        @Test
+        void 음식점의_태그가_없다면_빈_리스트를_반환한다() {
+            Member member1 = memberGenerator.generate("111", "[email protected]", "nickname1");
+            Member member2 = memberGenerator.generate("112", "[email protected]", "nickname2");
+            Store store = storeGenerator.generate("농민백암순대", "서울 강남구 대치동 896-33");
+            cheerGenerator.generateCommon(member1, store);
+            cheerGenerator.generateCommon(member2, store);
+
+            TagsResponse response = storeService.getStoreTags(store.getId());
+
+            assertThat(response.tags()).isEmpty();
+        }
+
+        @Test
+        void 음식점이_존재하지_않으면_예외를_발생시킨다() {
+            long nonExistentStoreId = 999L;
+
+            BusinessException exception = assertThrows(BusinessException.class,
+                    () -> storeService.getStoreTags(nonExistentStoreId));
+
+            assertThat(exception.getErrorCode()).isEqualTo(BusinessErrorCode.STORE_NOT_FOUND);
+        }
+    }
+
     @Nested
     class GetStoreImages {